Purify is a free Tumblr theme that features an elegant grid layout. This theme is fully responsive and retina ready, as well. This theme comes with options to filter your posts according to the type and the tag. This theme comes with shadows on the edges of each post, and not to mention, this theme comes with more than 40 customization options, including colors of the elements, etc. With this theme, permalink posts also come with the supportability for Vimeo and YouTube videos. If you are looking for an elegant grid Tumblr theme where you can insert a lot of information right on the home page, this theme will definitely worth a look.